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Appl. Sci. 2018, 8(3), 359; https://doi.org/10.3390/app8030359

Numerical Analysis to Improve the Ballistic Trajectory of an Air-Based Material Density Separator System

1
School of Mechanical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Korea
2
I-ENTEC Co. Ltd., 18-Gil 33, Seongseogongdanbukro, Dalseogu, Daegu 42712, Korea
*
Author to whom correspondence should be addressed.
Received: 2 February 2018 / Revised: 23 February 2018 / Accepted: 27 February 2018 / Published: 1 March 2018
(This article belongs to the Section Mechanical Engineering)
Full-Text   |   PDF [7476 KB, uploaded 1 March 2018]   |  

Abstract

A material density separator utilizes a high velocity channel of air with a ballistic trajectory to separate materials based on their different densities and sizes. Light materials are carried with the airflow, leaving behind the separated heavy materials. A vibrating bed is then used to collect both heavy and light plastic materials for further separation and recycling processes. The effectiveness of the separation process mainly depends on the ballistic trajectory of the air stream and the slanting position of the vibrating bed. In this study, flow characteristics inside the density separation system were investigated to optimize the ballistic trajectory of air and the slanting position of the vibrating bed to improve the separation process. Various inlet air velocities, duct shapes, and the slanting angles of the mechanical separators were used to study their effects on flow properties (velocity magnitude, pressure, shear stress, and vorticity). Results show that the ballistic trajectory of air strongly depends on the diameter and shape of the duct hole, the inclination angle of the vibrating bed, and the air inlet velocity. The selection of the suitable values of these parameters is necessary to improve the plastic separation process. View Full-Text
Keywords: density separator; vibrating bed; ballistic trajectory; slanting angles; flow properties density separator; vibrating bed; ballistic trajectory; slanting angles; flow properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ali, H.; Kim, K.W.; Bang, S.G.; Chae, H.B.; Shin, S.W.; Park, C.W. Numerical Analysis to Improve the Ballistic Trajectory of an Air-Based Material Density Separator System. Appl. Sci. 2018, 8, 359.

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